*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
.container{
	width: 870px;
	margin: auto;
}
.header{
	background-color:#54afdb;
	color:#ffffff;
}
.header a{
	color: #ffffff;
}
.nav{
	padding-top: 12px;
	padding-bottom: 12px;
}
/* 清除浮动 */
.nav::after{
	content: "";
	display: table;
	clear: both;
}
.col-left{
	height: 10px;
}
.col-center{
	text-align: right;
}
.col-right{
	text-alingh:right;
}
.col-right a{
	text-decoration: none;
	position: relative;
	top: 5px;
}